Ice-cream freezer.



PATENTED MAY 3, 1904.

A. STERN & J. MoLEAN.

ICE CREAM FREEZER.

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PATENTED MAY 3, 1904;

A. STERN & J. MoLEAN.

ICE CREAM FREEZER.

APPLICATION FILED MAY a, 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

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UNITED STATES Patented May 3, 1904.

PATENT OFFICE.

AARON STERN AND JOHN MoLEAN, OF NE\V YORK, N. Y.; SAID MoLEAN ASSIGNORTO SAID STERN.

ICE-CREAM FREEZER.

SPECIFICATION forming part of Letters Patent No. 758,791, dated May 3,1904,.

Application filed May 3,1903. Serial No. 156,293. (No model.)

To all whom, 1'25 may concern:

Be it known that we,AARoN STERN and J on CLEAN, citizens of the UnitedStates, residing in the borough of Manhattan, city of New York, in thecounty of New York and State of New York, have invented certain new anduseful Improvements in Ice-Cream Freezers, of whichthe following is aspecification, reference being had therein to the accompanying 1odrawings.

This invention relates to freezers for icecream, ices, sherbets, &c.,and has for its objects simplicity of construction, adaptability to thefreezing of a number of varieties of icecream, ices, or sherbets at thesame time or of a less number than the maximum capacity of an apparatus,ease and effectiveness of operation, and ready separation and assemblingof parts.

According to this invention a plurality of containers is provided, andthese containers are rotatably mounted and connected so as to rotatetogether, and according to our invention the containers areindependently rotata- 2 5 bly mounted, and means are provided forapplying rotative movement to one of the containers, and therebyrotating all of them.

The invention also includes the provision of an exterior casing for allof the containers and of removable separatingpartitions, providingcompartments for the several containers, so that the use of thecontainers may be limited to any number less thanthe whole number ofcontainers provided in the apparatus, and by the partitions the spacefor freezing medium may also be limited to the space immediately aboutthe container or containers in use.

The invention also includes the provision of readily-separable partscomposing the freezer,

4 so that the containers, or one or more of them, may be readily removedand inserted and the parts thereof separated for cleaning, and includesvarious improvements in the construction and combination of parts.

\Ve will now describe the construction of freezer shown in theaccompanying drawings and embodying our invention and will thereafterpoint out our invention in claims.

Figure 1 is a longitudinal sectional elevation of the freezer. Fig. 2 isa plan view of the same with the cover of the exterior casing or boxopen. Fig. 3 is a central transverse vertical section of the upper partof the freezer. Fig. 4 is a section of the same on the line 4 lof Fig.3.

The several parts of the freezer are inclosed within an exterior casingor box (4, having a hinged lid or cover I).

The freezer shown is adapted for freezing at the same time as many asthree varieties of ice-cream, ices, or sherbets, and three separatecontainers 1, 2, and 3 are provided, and the box is providedwithremovable partitions 6 and 7, sliding in guides or grooves 4c and 5,respectively, on the inside faces of the box and arranged between thecontainers, so as to provide a separate compartment for each container.\Vhen all of the containers are in use, the partitions may be removedand the whole of the space about the several containers supplied withthe freezing medium, and any one ortwo of the containers when not in usemaybe separated by a partition or partitions and only the space aboutthe container or containers in use may be supplied with thefreezingmedium, thus adapting the apparatus to the economical use of only one ofthe containers or of as many of the containers as desired.

Each of the containers has a conical projection at its bottom having abearing in a step 8 at the bottom of the box and is provided with aremovable cover 9, having a bearing on a centrally-arranged bar 10, thisbar 10 being held from rotation by an upper squared part entering asquare socket in a removable longitudinal upper bar 11 and extendingdown to the bottom of the container and having a conical lower endentering a counterpart depression in the bottom of the container. Eachcover 9 has a central boss bearing upwardly against the bottom of thelongitudinal upper bar 11. Thus each container is freely rotatable aboutits central bar 10. Each central bar 10 is provided with inclinedagitatingvanes 12 and also with cross-bars 13, carrying the scraperslet.

Each of the covers 9 fits tightly upon and over its container andengages therewith, so

as to impart its rotative movement thereto, as by a pin 15 on the coverengaging with a projection or lug 16 on the container. Theagitating-vanes 12 are inclined so as to force the cream or othermaterial downward, and thereby very effectively agitate the same. Eachof the covers 9 is also provided with a spur-gear 17, formed on its rimand meshing with the corresponding gear on the cover of the adjacentcontainer, so that motion transmitted to one container will be impartedto the other containers, the adjacent containers rotating in oppositedirections.

For the purpose of imparting rotation to the containers I provide abevel-gear 18, formed upon the cover of the central container 2 andmeshing with a pinion 19 on a short drivingshaft 20, which is fitted torotate in a hinged bracket 21 and is squared at its outer end to receivean operating wheel or crank and handle. The bracket 21 is hinged at theback of the box 1, and, asshown, a spring 22 is provided at the hinge 29to take up any looseness of parts and prevent rattling and also toinitially lift the bracket, and hinged catches 23 are provided at thefront of the box, engaging projections at the edges of the bracket 21and yieldingly held in engagement therewith by a spring 24:. The frontend of the bracket 21 passes through the front of the cover of the box,and its front face is flush therewith, so that the only protruding partis the squared front end of the driving-shaft 20. Hooks 25 are providedfor holding the cover 2 of the box in closed position. These hooks maybe disengaged and the cover swung up and back on its hinges, andthereafter the catches 23 may be disengaged and the bracket 21 alsoswung up and back on its hinges. I The longitudinal upper bar 11 willthen have all parts above it removed, and this longitudinal bar isdetachably held, so that it may be readily removed, being removablyseated at one end in a grooved socket-piece 27 and having a spring-bolt28 at the other end thereof. After the longitudinal bar 11 has beenremoved the several containers may be readily lifted out, their coversremoved, and they may be filled with the material to be frozen, or thefrozen material may be removed from them, the central bars 10 andagitators and scrapers thereon being readily removable from thecontainers.

If it is desired to use only one retainer at a time, the retainers 1 and3 need not be inserted in the freezer, the partitions 6 and 7 beingretained in place and only the space about the container 2 and betweenthe two partitions supplied with the freezing medium.

So, also, only the containers 1 and 2 or 2 and 3 may be used and inplace, with the partition between the two containers in use removed andthe other partition in place to confine the freezing medium to the spaceabout the containers in use, as above described.

The ready detachability of all parts of the freezer also permitsseparate and complete cleaning of all parts and sterilization of allparts which come in contact with the'material to be frozen.

The longitudinal upper bar 11 is provided onits lower face with annulargrooves 26 about the bearings of the covers, so that fluid which fallsupon the bar cannot enter the bearings or enter the containers.

It is obvious that the number of containers provided in an apparatusembodying the invention may be greater or less than in the constructionshown and that various modifications may be made in the constructionshown and above particularly described within the spirit and scope ofthe invention.

What we claim, and desire to secure by Letters Patent, is

1. In a freezer, the combination of a plurality of rotatable containers,an exterior casing having bearings for the lower ends of the containers,a movable upper bar, agitators located within the several containers andseated in the upper bar so as to be held from rotation, each of thecontainers including a cover having a bearing upon the agitating meansand the several covers being connected one to another so as to transmitmotion from one to another, and means for applying rotative movement toone of the covers. I

2. In a freezer, the combination of a plurality of rotatable containers,an exterior casing having bearings for the lower ends of the containersand movable partitions between the containers, a movable upper bar,stationary agitators located within the several containers and seated inthe upper bar, each of the containers includinga cover having a bearingupon the agitating means and the several covers being connected one toanother so as to transmit motion from one to another, a hinged bracketcarrying a driving-shaft, and motion-transmitting means connecting thedriving-shaft to one of the containers, substantially as set forth.

In testimony whereof we have aflixed ou signatures in presence of twowitnesses.

AARON STERN. JOHN MOLEAN. I/Vitnesses:

CHAS. E. SALOMON, HENRY BARNES.

IIO

